This drop-in A3 upper will mount to virtually any standard AR-15 mil-spec lower receiver. With a velocity of 2200 FPS, the Hornady 250 Grain SST/FT bullet in the 450 Bushmaster "Thumper" is designed for all large North American game. Though not a long distance cartridge, accuracy has proved to be…

The DPMS AR-15 A3 Lightweight Flattop Upper Assembly is a drop-in part that will attach to virtually any standard AR-15 lower assembly. Comes complete with charging handle, Commercial bolt and bolt carrier assembly, it is ready to pin to a complete lower assembly with no modification. The DPMS…

* Made of 7075 T6 Aluminum Forging. * Features M4 Feed Ramps * Hard Anodized Black * Can be used for Multiple Calibers on the AR15 Platform. * This Upper is Machined to the Mil Spec. * Match this Upper with one of our Lower Receivers for a solid fit !

…and Wear Resistance NOTE: This rail system is designed to fit with standard AR15 gas tubes. The compatibility with any special piston system is not guaranteed. Also, the rail system works with standard AR15upper receivers. It may not be compatible with any re-designed, oversized upper receiver.

The Slide Fire 2-piece hand guard is designed with upper and lower heat shields for maximum cooling. It accommodates gas piston or direct gas impingement systems and is designed to fit AR-15 platform carbine length rifles. The high strength polymer material is half the weight of aluminum hand…